A good quality lens, but it can give a puple/magenta tint to pictures taken with it,…Probably caused by internal reflections?
Its easy to focus and the aperture ring is easy to use.

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Very good lens, especialy at F/ 8, but is good at F/4, 5.6 and 11 too. It’s some cold (may be good in b&w and with a warm filter in color). So-so at F/ 1,8 and 2, better at F/2.8. The pancolar is something better. Both are goods normals

Fast, high resolution 4×5-6×6 medium-large format aerial reconnaissance lens made by Rank Taylor Hobson, England.
I converted this fixed focus, Vinten F95 mount lens to M42 mount with a custom made focussing/mount adapter as shown in the image.
Aperture range: f4-f16.
Iris: Sixteen blades.
Example of photo taken with this lens fitted to my DSLR:http://sigmasd10.fotopic.net/p35866423.html
(Click on the pic to see it full size)